OFFSET
1,2
FORMULA
T(n,n) = numerator(f(n, n)) = numerator(2*(n-1)!/(n+1)) = A090586(n).
EXAMPLE
Triangle T(n,k) (with rows n >= 1 and columns k >= 1) begins as follows:
1,
2, 2,
3, 2, 1,
4, 4, 4, 12,
5, 20, 10, 12, 8,
6, 10, 20, 36, 48, 240,
7, 14, 35, 84, 168, 240, 180;
...
CROSSREFS
KEYWORD
AUTHOR
Amarnath Murthy, Mar 30 2004
EXTENSIONS
Edited and extended by David Wasserman, Aug 29 2006
STATUS
approved